O - Page 16

O&M - Operation and Maintenance

O3 - Ozone

OCB - Oil Circuit Breaker

ODAC - Oil Depletion Analysis Centre

OECD - Organization of Economic Cooperation and Development

OEE - Office of Energy Efficiency

OEMs - Original Equipment Manufacturers

OGJ - The Oil & Gas Journal

OIRA - Office of Information and Regulatory Affairs

OMB - Office of Management and Budget

OOIP - Original Oil in Place

OPEC - Organization of Petroleum Exporting Countries

OSHA - Occupational Safety and Health Administration (or Act)